What does single round robin mean?

A single round robin is a competition for each opponent. Round robin system is often used in group matches or leagues. Participants competed with other contestants one after another. One race between every two contestants is called a single round robin, and two races are called a double round robin. In addition, there are relatively rare rounds of round robin.

Generally, the arrangement of single-cycle competition sequence adopts rotation method. No matter whether the number of teams is even or odd, they should be arranged in even numbers. If it is an odd number, you can make up a 0, and the team that meets a 0 will have a bye. This rotation method is suitable for teams that don't know each other's strength, so it is very likely that the strong teams will meet in advance by drawing lots and positioning.

Double cycle means that all teams can meet twice, and finally rank according to the points and gain and loss rates of all teams in the two cycles. If there are few teams or more competition opportunities, double-cycle competition is usually adopted. The number of rounds, the number of games and the competition time of double round robin are all multiples of single round robin.

The grouping cycle is to divide all the participating teams into several groups for the first-stage preliminary contest, and then for the second-stage finals between the winning teams in each group, so as to determine the ranking below 1. The group preliminaries can adopt the single round robin method, and the finals can adopt the single round robin, the second-place namesake competition, the cross competition and so on. Group cycle is suitable for competitions with many teams, and it can complete the competition tasks reasonably and fairly in a short time.